CN111022057B - Subway tunnel well entry construction method and construction well supporting structure in loess area - Google Patents
Subway tunnel well entry construction method and construction well supporting structure in loess area Download PDFInfo
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- CN111022057B CN111022057B CN201911331501.7A CN201911331501A CN111022057B CN 111022057 B CN111022057 B CN 111022057B CN 201911331501 A CN201911331501 A CN 201911331501A CN 111022057 B CN111022057 B CN 111022057B
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- 238000010276 construction Methods 0.000 title claims abstract description 63
- 239000004567 concrete Substances 0.000 claims abstract description 92
- 238000009412 basement excavation Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000011378 shotcrete Substances 0.000 claims abstract description 7
- 239000002689 soil Substances 0.000 claims description 18
- 238000011835 investigation Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/06—Lining shafts; Linings therefor with iron or steel
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/11—Lining shafts; Linings therefor with combinations of different materials, e.g. wood, metal, concrete
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D7/00—Shaft equipment, e.g. timbering within the shaft
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Wood Science & Technology (AREA)
- Lining And Supports For Tunnels (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
A subway tunnel well entry construction method and a construction well supporting structure in loess areas are provided, wherein the construction method comprises the following steps: dividing a vertical shaft to be excavated into a first half area and a second half area, excavating the vertical shaft in sequence, and arranging a shotcrete support and a concrete support in the excavating process; dividing the underground area into a plurality of parts for excavation in sequence, setting a concrete support and a temporary support in time every time one part is excavated, and dismantling the temporary support after all the parts are excavated, and connecting the concrete supports of the two parts on the same side into a support ring to form the underground area; the method uses the thought of gradual progress from small to large, carries out construction in areas and blocks, and sets up supporting and supporting in time to ensure safety; according to the construction method, a larger underground construction space can be obtained on the premise of ensuring safety and occupying the ground construction land as little as possible; the method has the characteristics of strong practicability and high safety.
Description
Technical Field
The invention belongs to the technical field of tunnel construction, and particularly relates to a subway tunnel well entry construction method and a construction well supporting structure in loess areas.
Background
As urban population increases, traffic becomes more and more congested, building subway tunnels becomes an effective way to alleviate traffic congestion. The loess strata in China are widely distributed, and the subway built in the loess strata has more and more mileage. The construction period of the subway tunnel is generally tense, in order to increase the construction progress, a shaft is often arranged to increase the working face, a current common method is to arrange the shaft on one side of the tunnel, then excavate through a transverse channel to form the working face, and the method is high in safety and has the defect of wide construction land range. However, in cities, due to the limitation of construction land, land reclamation is difficult to perform, and the aforementioned construction methods are often not satisfied.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a subway tunnel well entry construction method and a construction well supporting structure in loess areas, which can greatly reduce the construction land requirement on the premise of ensuring the construction safety and have the advantages of safety and practicability.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A subway tunnel well entry construction method in loess areas comprises the following steps:
Step 1: determining the excavation position of the vertical shaft 24 by combining the investigation data, and setting an excavation tool;
Step 2: dividing the shaft 24 into a first half 7 and a second half 8; firstly, excavating a first half area 7; in the process of excavating the first half area 7, driving anchor rods 9 on the cambered surface wall of the first half area 7, performing shotcrete support, and performing first concrete temporary support 10 on the plane wall of the first half area 7 until reaching the position right above a preset vault of a tunnel;
step 3: excavating a second half area 8; in the process of excavating the second half area 8, driving anchor rods 9 on the cambered surface wall of the second half area 8, performing shotcrete support, and performing second concrete temporary support 11 on the second half area 8 based on the first concrete temporary support 10 until reaching the position right above a preset vault of the tunnel;
Step 4: excavating soil body of the first area 1 downwards from the bottom of the first half area 7 to form a construction site, and putting down small construction tools from the first half area 7; then excavating soil of a third area 3, constructing a third concrete support 12 on the vault of the third area 3, and constructing a first temporary support 13 on the bottom;
step 5: excavating soil of the second area 2 downwards from the bottom of the second half area 8 to form a construction site, putting down small construction tools from the second half area 8, excavating soil of the fourth area 4, constructing a fourth concrete support 14 at the bottom of the fourth area 4, and temporarily supporting 15 at the top Shidi;
step 6: excavating soil body of a fifth area 5, forming a second support ring 19 by the fifth concrete support 16 and a fourth concrete support 14 at the bottom of a fourth area 4, and forming a top Shidi five concrete supports 16;
Step 7: excavating soil of a sixth area 6, applying a sixth concrete support 18 at the bottom, and forming a first support ring 17 by the sixth concrete support 18 and a third concrete support 12 at the top of the third area 3;
step 8: removing the first temporary support 13 between the third area 3 and the sixth area 6, and applying a first waterproof layer 20 and a first annular secondary lining 21 on the surface of the first support ring 17; meanwhile, removing the second temporary support 15 between the fourth area 4 and the fifth area 5, and applying a second waterproof layer 22 and a second annular secondary lining 23 on the surface of the second support ring 19 to form a downhole construction space 25;
step 9: removing the first concrete temporary support 10 and the second concrete temporary support 11 between the first half 7 and the second half 8;
The supporting structure of the subway tunnel construction well in the loess area comprises a vertical shaft 24, wherein an underground construction space 25 is arranged below the vertical shaft 24, and a concrete supporting layer 28 is arranged on the wall of the underground construction space 25;
The shaft 24 comprises a first half 7 and a second half 8; anchor rods 9 are driven into the arc-shaped wall of the first half area 7, and are provided with spray anchor supports, and first concrete temporary supports 10 are provided on the plane wall of the first half area 7; anchor rods 9 are also driven into the arc-shaped wall of the second half area 8, and the opposite side of the arc-shaped wall of the second half area 8 is provided with a second concrete temporary support 11 based on a first concrete temporary support 10;
The downhole construction space 25 comprises a first area 1, a second area 2, a third area 3, a fourth area 4, a fifth area 5 and a sixth area 6;
The first zone 1 and the second zone 2 are located below the shaft 24;
a third concrete support 12 is arranged at the top of the third area 3;
A fourth concrete support 14 is arranged at the bottom of the fourth area 4;
a fifth concrete support 16 is arranged at the bottom of the fifth area 5;
A sixth concrete support 18 is arranged at the bottom of the sixth area 6;
A third area 3 is arranged on one side of the first area 1, a second area 2 is arranged on the other side of the first area, and a sixth area 6 is arranged below the third area 3;
a fourth area 4 is arranged on one side of the second area 2, and a first area 1 is arranged on the other side of the second area; above the fourth zone 4 is a fifth zone 5;
The concrete supporting layer 28 comprises a first supporting ring 17 and a second supporting ring 19; the first support ring 17 comprises a third concrete support 12 arranged at the top of the third zone 3 and a sixth concrete support 18 arranged at the bottom of the sixth zone 6; the second support ring 19 comprises a fourth concrete support 14 arranged at the bottom of the fourth zone 4 and a fifth concrete support 16 arranged at the top of the fifth zone 5.
The first support ring 17 is provided with a first temporary support 13 in the radial direction.
The second support ring 19 is provided with a second temporary support 15 in the radial direction.
The surface of the concrete supporting layer 28 is provided with a waterproof layer 27, and the surface of the waterproof layer 27 is provided with a secondary lining 26.
The beneficial effects of the invention are as follows: the invention adopts the thought of gradually and gradually excavating a vertical shaft 24 into a first half area 7 and a second half area 8 respectively, and the underground area is divided into six areas to be excavated one by one in reasonable sequence, wherein each excavated area is provided with a supporting structure in time so as to ensure safety, and meanwhile, a safe and larger underground construction space can be obtained underground on the premise of ensuring that the ground construction range is as small as possible.
Drawings
Fig. 1 is a schematic view of a construction structure of the present invention.
Fig. 2 is a top view of shaft 24.
Fig. 3 is a schematic diagram of the structure of the third region 3 and the sixth region 6 ending in the fourth step.
Fig. 4 is a schematic diagram of the structure of the fourth region 4 and the fifth region 5 ending in the fifth step.
Fig. 5 is a schematic diagram of the structure of the fourth region 4 and the fifth region 5 ending in step six.
Fig. 6 is a schematic structural diagram of the third region 3 and the sixth region 6 at the end of the seventh step.
Fig. 7 is a schematic diagram of the structure of the fourth region 4 and the fifth region 5 at the end of the step eight.
Fig. 8 is a schematic structural diagram of the third region 3 and the sixth region 6 at the end of the step eight.
Fig. 9 is an overall schematic of the downhole construction space 25 after the end of step 9.
1. A first region; 2. a second region; 3. a third region; 4. a fourth region; 5. a fifth region; 6. a sixth region; 7. a first half region; 8. a second half; 9. a bolt; 10. a first concrete temporary support; 11. the second concrete temporary support; 12. a third concrete support; 13. a first temporary support; 14. a fourth concrete support; 15. a second temporary support; 16. fifth concrete support; 17. a first support ring; 18. a sixth concrete support; 19. a second support ring; 20. a first waterproof layer; 21. a first annular secondary lining; 22. a second waterproof layer; 23. a second annular secondary lining; 24. a shaft; 25. a downhole construction space; 26. a concrete support layer; 27. a waterproof layer; 28. and (5) secondary lining.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a subway tunnel well entry construction method in loess areas comprises the following steps:
step 1: determining the excavation position of the vertical shaft 24 by combining the investigation data, and setting an excavation tool;
Step 2: dividing the shaft 24 into a first half 7 and a second half 8; firstly, excavating a first half area 7; in the process of excavating the first half area 7, driving anchor rods 9 on the cambered surface wall of the first half area 7, performing shotcrete support, and performing first concrete temporary support 10 on the plane wall of the first half area 7 until reaching the position right above a preset vault of a tunnel;
step 3: excavating a second half area 8; in the process of excavating the second half area 8, driving anchor rods 9 on the cambered surface wall of the second half area 8, performing shotcrete support, and performing second concrete temporary support 11 on the second half area 8 based on the first concrete temporary support 10 until reaching the position right above a preset vault of the tunnel;
referring to fig. 3, step 4: excavating soil body of the first area 1 downwards from the bottom of the first half area 7 to form a construction site, and putting down small construction tools from the first half area 7; then excavating soil of a third area 3, spraying concrete on the vault of the third area 3 to form a third concrete support 12, and applying a first temporary support 13 to the bottom;
referring to fig. 4, step 5: excavating soil of the second area 2 downwards from the bottom of the second half area 8 to form a construction site, putting down small construction tools from the second half area 8, excavating soil of the fourth area 4, spraying concrete at the bottom of the fourth area 4 to form a fourth concrete support 14, and temporarily supporting 15 at the top Shidi;
referring to fig. 5, step 6: excavating soil body of a fifth area 5, forming a second support ring 19 by the fifth concrete support 16 and a fourth concrete support 14 at the bottom of a fourth area 4, and forming a top Shidi five concrete supports 16;
referring to fig. 6, step 7: excavating soil of a sixth area 6, applying a sixth concrete support 18 at the bottom, and forming a first support ring 17 by the sixth concrete support 18 and a third concrete support 12 at the top of the third area 3;
referring to fig. 7 and 8, step 8: removing the first temporary support 13 between the third area 3 and the sixth area 6, and applying a first waterproof layer 20 and a first annular secondary lining 21 on the surface of the first support ring 17; meanwhile, removing the second temporary support 15 between the fourth area 4 and the fifth area 5, and applying a second waterproof layer 22 and a second annular secondary lining 23 on the surface of the second support ring 19 to form a downhole construction space 25;
step 9: the first concrete temporary support 10 and the second concrete temporary support 11 between the first half 7 and the second half 8 are removed.
Referring to fig. 9, a supporting structure for a subway tunnel construction well in loess area comprises a vertical shaft 24, an underground construction space 25 is arranged below the vertical shaft 24, and a concrete supporting layer 28 is applied on the wall of the underground construction space 25.
Referring to fig. 1 and 2, the shaft 24 includes a first half 7 and a second half 8; anchor rods 9 are driven into the arc-shaped wall of the first half area 7, and are provided with spray anchor supports, and first concrete temporary supports 10 are provided on the plane wall of the first half area 7; anchor rods 9 are also driven into the arc-shaped wall of the second half area 8, and the opposite side of the arc-shaped wall of the second half area 8 is provided with a second concrete temporary support 11 based on the first concrete temporary support 10.
Referring to fig. 1, the downhole construction space 25 includes a first zone 1, a second zone 2, a third zone 3, a fourth zone 4, a fifth zone 5, and a sixth zone 6;
The first zone 1 and the second zone 2 are located below the shaft 24;
a third concrete support 12 is arranged at the top of the third area 3;
A fourth concrete support 14 is arranged at the bottom of the fourth area 4;
a fifth concrete support 16 is arranged at the bottom of the fifth area 5;
the sixth zone 6 is provided at the bottom with a sixth concrete support 18.
A third area 3 is arranged on one side of the first area 1, a second area 2 is arranged on the other side of the first area, and a sixth area 6 is arranged below the third area 3;
a fourth area 4 is arranged on one side of the second area 2, and a first area 1 is arranged on the other side of the second area; above the fourth zone 4 is a fifth zone 5;
Referring to fig. 5 and 6, the concrete blanket 28 includes a first support ring 17 and a second support ring 19, and the first support ring 17 includes a third concrete support 12 disposed at the top of the third region 3 and a sixth concrete support 18 disposed at the bottom of the sixth region 6; the second support ring 19 comprises a fourth concrete support 14 arranged at the bottom of the fourth zone 4 and a fifth concrete support 15 arranged at the top of the fifth zone 5.
Referring to fig. 7, 8 and 9, the surface of the concrete cover 28 is provided with a waterproof layer 27.
The waterproof layer 27 includes a first waterproof layer 20 applied to the surface of the first support ring 17 and a second waterproof layer 22 applied to the surface of the second support ring 19.
The waterproof layer 27 is provided with a secondary lining 26 on its surface.
The secondary liner 26 includes a first annular secondary liner 21 applied to the surface of the first waterproof layer 20 and a second annular secondary liner 23 applied to the surface of the second waterproof layer 22.
The working principle of the invention is as follows: according to the invention, construction is performed in a progressive manner, a vertical shaft 24 is divided into a first half area 7 and a second half area 8 for excavation respectively, a downhole area is divided into a first area 1, a second area 2, a third area 3, a fourth area 4, a fifth area 5 and a sixth area 6 for excavation one by one in a reasonable excavation sequence, a supporting structure is timely arranged for ensuring safety every excavation of one area, and finally a safe and large downhole construction space is obtained.
Claims (4)
1. The subway tunnel well entering construction method in loess areas is characterized by comprising the following steps of:
step 1: determining the excavation position of the vertical shaft (24) by combining the investigation data, and setting an excavation tool;
step 2: dividing the shaft (24) into a first half (7) and a second half (8); firstly, excavating a first half area (7); in the process of excavating the first half area (7), driving anchor rods (9) on the cambered surface wall of the first half area (7), performing shotcrete support, and performing first concrete temporary support (10) on the plane wall of the first half area (7) until reaching the position right above a preset vault of a tunnel;
Step 3: excavating a second half-zone (8); in the process of excavating the second half area (8), driving anchor rods (9) on the cambered surface wall of the second half area (8), performing shotcrete support, and performing concrete temporary support (11) on the second half area (8) Shidi on the basis of the first concrete temporary support (10) until reaching the position right above a preset vault of a tunnel;
step 4: excavating soil body of the first area (1) downwards from the bottom of the first half area (7) to form a construction site, and putting down small construction tools from the first half area (7); then excavating soil of a third area (3), applying a third concrete support (12) on the vault of the third area (3), and applying a first temporary support (13) on the bottom;
Step 5: excavating soil of a second area (2) downwards from the bottom of a second half area (8) to form a construction site, putting down small construction tools from the second half area (8), excavating soil of a fourth area (4), constructing a fourth concrete support (14) at the bottom of the fourth area (4), and temporarily supporting (15) at the top Shidi;
step 6: excavating soil body of a fifth area (5), and forming a second support ring (19) by the fifth concrete support (16) and a fourth concrete support (14) at the bottom of a fourth area (4) at the top Shidi;
Step 7: excavating soil of a sixth area (6), and constructing a sixth concrete support (18) at the bottom, wherein the sixth concrete support (18) and a third concrete support (12) at the top of a third area (3) form a first support ring (17);
Step 8: removing a first temporary support (13) between the third area (3) and the sixth area (6), and applying a first waterproof layer (20) and a first annular secondary lining (21) on the surface of the first support ring (17); meanwhile, removing a second temporary support (15) between the fourth area (4) and the fifth area (5), and applying a second waterproof layer (22) and a second annular secondary lining (23) on the surface of the second support ring (19) to form an underground construction space (25);
Step 9: removing the first concrete temporary support (10) and the second concrete temporary support (11) between the first half-zone (7) and the second half-zone (8);
The supporting structure of the subway tunnel construction well in the loess area comprises a vertical shaft (24), wherein an underground construction space (25) is arranged below the vertical shaft (24), and a concrete supporting layer (28) is arranged on the wall of the underground construction space (25);
The shaft (24) comprises a first half (7) and a second half (8); an anchor rod (9) is driven into the arc-shaped wall of the first half area (7), and a spray anchor support is applied, and a first concrete temporary support (10) is applied to the plane wall of the first half area (7); anchor rods (9) are also driven into the arc-shaped wall of the second half area (8), and the opposite side of the arc-shaped wall of the second half area (8) is provided with a second concrete temporary support (11) based on the first concrete temporary support (10);
The underground construction space (25) comprises a first area (1), a second area (2), a third area (3), a fourth area (4), a fifth area (5) and a sixth area (6);
the first area (1) and the second area (2) are positioned below the vertical shaft (24);
a third concrete support (12) is arranged at the top of the third area (3);
A fourth concrete support (14) is arranged at the bottom of the fourth area (4);
a fifth concrete support (16) is arranged at the bottom of the fifth area (5);
a sixth concrete support (18) is arranged at the bottom of the sixth area (6);
One side of the first area (1) is a third area (3), the other side of the first area is a second area (2), and a sixth area (6) is arranged below the third area (3);
One side of the second area (2) is a fourth area (4), and the other side is a first area (1); above the fourth zone (4) is a fifth zone (5);
the concrete supporting layer (28) comprises a first supporting ring (17) and a second supporting ring (19), and the first supporting ring (17) comprises a third concrete supporting (12) arranged at the top of the third area (3) and a sixth concrete supporting (18) arranged at the bottom of the sixth area (6); the second support ring (19) comprises a fourth concrete support (14) arranged at the bottom of the fourth area (4) and a fifth concrete support (16) arranged at the top of the fifth area (5).
2. The subway tunnel well entering construction method in loess area according to claim 1, wherein the first supporting ring (17) is provided with a first temporary support (13) in a radial direction.
3. The subway tunnel well entering construction method in loess area according to claim 1, wherein the second supporting ring (19) is provided with a second temporary support (15) in a radial direction.
4. The subway tunnel well entry construction method in loess area according to claim 1, characterized in that a waterproof layer (27) is applied on the surface of the concrete supporting layer (28), and a secondary lining (26) is applied on the surface of the waterproof layer (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331501.7A CN111022057B (en) | 2019-12-21 | 2019-12-21 | Subway tunnel well entry construction method and construction well supporting structure in loess area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331501.7A CN111022057B (en) | 2019-12-21 | 2019-12-21 | Subway tunnel well entry construction method and construction well supporting structure in loess area |
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| Publication Number | Publication Date |
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| CN111022057A CN111022057A (en) | 2020-04-17 |
| CN111022057B true CN111022057B (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911331501.7A Active CN111022057B (en) | 2019-12-21 | 2019-12-21 | Subway tunnel well entry construction method and construction well supporting structure in loess area |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10280861A (en) * | 1997-04-01 | 1998-10-20 | Shimizu Corp | Construction method for tunnel junction part |
| CN107893659A (en) * | 2017-10-18 | 2018-04-10 | 中铁十六局集团地铁工程有限公司 | A kind of shaft excavation construction method for charging of being unearthed by underground |
| CN108425678A (en) * | 2018-04-12 | 2018-08-21 | 中铁四局集团有限公司 | A kind of construction method in big cross section subway connection tunnel |
| CN108678751A (en) * | 2018-05-16 | 2018-10-19 | 北京中地盾构工程技术研究院有限公司 | The shield cutter inspection-pit assembly construction method excavated after first jacking |
-
2019
- 2019-12-21 CN CN201911331501.7A patent/CN111022057B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10280861A (en) * | 1997-04-01 | 1998-10-20 | Shimizu Corp | Construction method for tunnel junction part |
| CN107893659A (en) * | 2017-10-18 | 2018-04-10 | 中铁十六局集团地铁工程有限公司 | A kind of shaft excavation construction method for charging of being unearthed by underground |
| CN108425678A (en) * | 2018-04-12 | 2018-08-21 | 中铁四局集团有限公司 | A kind of construction method in big cross section subway connection tunnel |
| CN108678751A (en) * | 2018-05-16 | 2018-10-19 | 北京中地盾构工程技术研究院有限公司 | The shield cutter inspection-pit assembly construction method excavated after first jacking |
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| CN111022057A (en) | 2020-04-17 |
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